|Número de publicación||US4784897 A|
|Tipo de publicación||Concesión|
|Número de solicitud||US 06/796,935|
|Fecha de publicación||15 Nov 1988|
|Fecha de presentación||12 Nov 1985|
|Fecha de prioridad||12 Mar 1984|
|También publicado como||DE3408932A1, EP0159514A1, EP0159514B1, EP0159514B2, WO1985004199A1|
|Número de publicación||06796935, 796935, US 4784897 A, US 4784897A, US-A-4784897, US4784897 A, US4784897A|
|Inventores||Heinrich Brands, Siegfried Fiebig, Hans Schillings|
|Cesionario original||Fiebig & Schillings Gmbh|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (8), Citada por (66), Clasificaciones (17), Eventos legales (6)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
This application is a continuation of international application PCT/DE85/00078 filed Mar. 12, 1985, with the United States as a designated state, published Sept. 26, 1985 as WO85/04199.
Boards provided with cover layers on both sides, such as gypsum board and foam boards made of polystyrene, polyurethane or urea-formaldehyde resins are widely used as structural components such as roof elements and for thermal and acoustical insulation, and as packing material.
These materials are today produced to a very great extent in a continuous process in so-called board plants in which the foaming is performed between revolving board belts, while the core material or its formation from liquid components, as for example in the case of polyurethane foam, is shaped against these revolving board belts. To prevent adhesion to these revolving board belts, paper layers accompany the upper and lower board belts in contact therewith. These layers bond to the core material, i.e., the polurethane foam for example, and usually also remain on them as bilateral cover layers, because the board thus made thereby gains stability and strength, and also the surface quality improves. It has already been proposed to use webs of matting or fabric as cover layer materials, such as mats or fabrics of cellulose fibers, polyester fibers and, glass fiber mats or fabrics on account of their incombustibility. Another advantage of such cover layers of matting or fabric consists in the fact that the core material, such as the polyurethane foam, is able to penetrate the interstices present in them and thus a good anchoring between core material and cover layer material is assured. The bond between core and cover layer material of paper or film has always been problematical. Nevertheless, matting and fabric materials have not succeeded as cover layer material, because the liquid components penetrate through the interstices present in the matting or fabric and result in adhesion to the board bands. Such liquid or liquid-containing starting components are present especially in the manufacture of PU hard foams, but also in urea-formaldehyde foam materials in which the starting materials set or react chemically, and in the manufacture of gypsum boards which set hydraulically.
An attempt has been made to remedy this disadvantage by coating the matting or fabric materials with polyethylene or bitumen, it being necessary in the latter case to sprinkle the cover layer additionally with sand to enable it to be handled. It is disadvantageous in these known materials, however, that both polyethylene and bitumen penetrate rather strongly into the matting or fabric, which thereby loses its open structure, and the bond between matting or fabric and the core of the material forming the board thus becomes insufficient. In the case of PU hard foam boards, on the example of which the invention is described below, there is another disadvantage in the fact that both materials are easily combustible, and thus the PU hard foam board made therefrom and provided with cover layers has extremely poor properties with regard to its behavior wh.
Therefore there exists an urgent technical need for a cover layer material which does not have the disadvantages indicated above, which permits the continuous production of boards from liquid starting components without passing through the matting or fabric and sticking to the boards or webs. Such a cover layer material is furthermore to conform in its behavior in contact with fire as closely as possible with building material group B2 or B1, but if possible even with building material group A2. It is furthermore to be resistant to hot bitumen, so that the cover layer will not be destroyed by the tarring so frequently performed on flat roofs, for example, and so that no formation of blisters, i.e., partial separation between the cover layer and PU hard foam, will occur.
This problem is solved by a cover layer material with the distinguishing features of the patent claim, which is characterized by the fact that the matting or fabric has on one side a coating of 70 to 94 wt.-% of a powdered inorganic material and 5 to 30 wt.-%, absolutely dry, of a binding agent; preferably the powdered inorganic material in the coating composition amounts to even 80 to 94 wt.-%, absolutely dry, of the total coating.
In DE-OS No. 31 20 342, with the object of achieving fire retardancy, an insulation body is described which has an outer skin composed of glass fiber matting and bearing a coating of at least one metal oxide such as aluminum hydroxide and/or antimony oxide and plastic copolymers. The requirements specified for the invention and set forth above cannot be satisfied by the technical teaching of this prior disclosure nor is the invention suggested by it. The content of metal oxide in the dried composition is between 50 and 70 wt.-%, the coating composition being applied in a pasty, foamed state to the glass fiber matting and then dried by radiant heat. Such a coating composition may satisfy the requirement of fire retardancy, but it does not provide the solution of the problem addressed herein. In the case of percentage contents of 50 to 70 wt.-% of inorganic material, these are concentrations of solids as they are commonly used in brushing and coating compositions. For the purpose pursued by the invention, such common coating compositions, with a high content of binding agent and liquid, are not suitable because liquid and binding agent strike through the matting or fabric and lead to the feared adhesion to the board belts of the continuous board machine. The considerable amounts of liquid to be removed also lead to bubbles and shrinkage in the drying process and the coating does not dry free of cracking.
For this reason a preferred method of producing the cover layer material consists in the use of a coating composition with a very high solids content, preferably of 70 to 80 wt.-%. Surprisingly, this coating can still be applied with a backfilling machine. It is best dried with hot, recirculating air and results in a perfectly impermeable coating without bubbles, shrinkage or cracking.
The advantage of the cover layer material according to the invention lies in the fact that, due to the unusually high content of inorganic material, the matting or fabric becomes impermeable to the liquid starting components, so that the open structure of the matting or fabric is preserved and good anchoring of the cover layer material to the core material of the plate during the later shaping and foaming is assured.
The high content of inorganic material furthermore brings it about that a PU hard foam web provided with this cover layer material is resistant to hot bitumen at, for example, 180°, the cover layer is not destroyed and no bubble formation occurs between cover layer and PU hard foam. Moreover, the high content of inorganic material further reduces inflammability below that of previously known materials.
The binding agents can be not only those on an inorganic basis, such as water glass, but also those on an organic basis, especially on a plastic basis. Since water glass as binding agent makes the cover layer rather brittle, mixtures containing binding agents of a plastic basis are also recommendable. In organic binding agents have the advantage that they further reduce inflammability.
The binding agents on the basis of plastic are preferably used in the form of plastic dispersions with a solids content of 35 to 70% by weight. They include especially polyvinylidene chloride and polyvinyl chloride, which have the advantage of being fire retardant, and copolymers and terpolymers of vinyl acetate with maleic acid and acrylic acid. Especially preferred on account of their good binding agent properties in comparison with the organic coating components, styrene-butadiene copolymers and polymers or copolymers of acrylic acid and methacrylic acid, respectively. The amount of plastic dispersion to be used depends to some extent on the solids content, and, to keep the energy required for the drying of the coating low, dispersions of the highest possible solids content are used.
The greatest variety of powdered substances are suitable as inorganic material, especially those on a mineral basis, such as silicates, clays etc. On account of its easy availability, calcium carbonate has proven to be especially preferred.
For the achievement of better values in relation to behavior on exposure to fire ["Brandverhalten"] aluminum hydroxide or alumina trihydrate is recommendable as an inorganic material, with which a fire retardancy rating of A2 can be achieved.
To remain economical, in a preferred embodiment of the invention the inorganic material consists of a mixture of 10 to 50 weight-percent of calcium carbonate and 90 to 50 weight-percent of aluminum hydroxide or alumina trihydrate. In this case, the higher the content of the aluminum hydroxide or the alumina trihydrate content is, the more fire-retardant the cover layer material and the PU hard foam board covered with it becomes.
It is desirable for the coating also to contain certain percentages of organic or mineral colorants for the purpose of distinguishing different quality classes of the board, for example with regard to fire retardancy. To counteract the translucency of the cover material and prevent light from showing through the often yellowish PU hard foam, coloring the cover material with carbon black has proven to be preferable, because even small amounts cover large areas.
For special applications, especially when a white cover layer material and thus a white PU hard foam board or white gypsum board is desired, the admixture of up to 5 weight-percent of titanium oxide powder, with respect to the total amount of inorganic material, has proven to be preferable.
The matting or fabric used for the cover layer material can best have a specific weight between 35 and 350 g/m2, preferably from 40 g/m2 to 150 g/m2, and the applied weights of the coating are best between 150 and 450 g/m2, these weights being dependent to a great extent on the application, the thickness of the core material, and other such factors. Glass fiber matting and fabric material has proven especially desirable as matting and fabric material, since it is incombustible. A matting and fabric material on a cellulose basis is desirable for use as a matting and fabric material on an organic basis. On account of its good strength rating, a polyester fiber matting is preferentially suitable. In the case of cover layer material for gypsum boards, it is desirable to use both nonwoven and woven fabrics together, because in this manner the liability to breakage of the gypsum boards can be very substantially reduced. Quite generally, the use of matting and woven fabric together can considerably increase the longitudinal and transverse strength.
Especially preferred is the use of the cover layer material according to the invention for the production of boards provided with cover layers on both sides in a continuous board producing plant using a top and bottom belt. It is also, of course, suitable for use as a laminating material for lamination, for example, onto polystyrene foam boards cut from a block of foam polystyrene, and here again the uncoated side of the matting or fabric is available for a good bonding of the cover layer material to the core material through the laminating material.
The invention will be further explained below through preferred examples relating to the method of manufacture of the cover layers:
On a glass fiber mat having a specific weight of about 60 g/cm2, a coating composition is applied in a backfilling machine, the composition consisting of CaCO3 powder of a random average particle size of about 10 μm and of a polystyrene-butadiene dispersion with a solids content of 57% by weight, with the addition of 1.5 g of common adjuvants such as antifoaming agents, wetting agents and preservatives, the solids content of the coating composition amounting in all to about 75 wt.-%. At the same time the percentages of CaCO3 powder and plastic dispersion in the coating composition are selected such that, after drying with hot circulating air in a drying tunnel, the coating consists of 92 wt.-% of inorganic material and 6.5 wt.-% of binding agent and the balance of adjuvants. The coating weight amounts to 250 g/m2 absolutely dry.
A mat on a cellulose basis treated for fire retardancy, having a weight of 50 g/m2, is coated in a backfilling machine with a coating composition made of aluminum hydroxide, calcium carbonate, and a plastic dispersion made from a terpolymer of vinyl acetate, maleic acid and methacrylic acid ester, with a solids content of 50 wt.-% and 3 g of the common adjuvant, the solids content of the coating composition totaling about 73 wt.-%. The percentages of aluminum hydroxide, calcium carbonate and plastic dispersion in the coating composition are selected such that, after drying in hot circulating air in a drying tunnel, the coating consists of 60 wt.-% of aluminum hydroxide, 22 wt.-% of calcium carbonate, and 15 wt.-% of binding agent, balance adjuvants. The coating rate amounts to approximately 250 g/m2 absolutely dry weight.
To a mat composed of polyester fibers and weighing 40 g/m2, there is applied a coating composition of 25 g of aluminum hydroxide, 43 g of calcium carbonate, 4 g of titanium dioxide, 8 g of a plastic dispersion of a terpolymer of vinyl acetate, maleic acid and methacrylic acid ester with a solids content of 57 wt.-% and approximately 1 g of common thickening, crosslinking and preservative agents, and 23 g of water, by means of a backfilling machine, and dried with hot circulating air in a drying tunnel. This cover layer material is characterized by its white color due to the use of titanium dioxide, and is used in the manufacture of white boards which are used a wall covering. The coating rate on the dried cover layer consists of about 270 g/m2 absolutely dry weight.
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US4371579 *||9 Oct 1980||1 Feb 1983||Westinghouse Electric Corp.||Fire-resistant filler sheet laminates|
|US4394411 *||8 Mar 1982||19 Jul 1983||Firma Carl Freudenberg||Structural panel of gypsum with textile casing and method for producing same|
|US4567093 *||25 Abr 1983||28 Ene 1986||Achilles Corporation||Rubber coated fabric|
|US4606958 *||25 Jun 1984||19 Ago 1986||Lever Brothers Company||Highly absorbent substrate article|
|CA1151519A1 *||21 Dic 1979||9 Ago 1983||Willi Kost||Flame resistant laminates|
|DE3120342A1 *||22 May 1981||9 Dic 1982||Dieter Siebert||Insulating element, in particular thermal insulation sheet or board|
|GB1160891A *||Título no disponible|
|JPS61641A *||Título no disponible|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US5232745 *||1 Mar 1991||3 Ago 1993||Manville Corporation||Method of neutralizing acid containing compositions present in an insulation board|
|US6341462||8 Ene 1999||29 Ene 2002||Elk Corporation Of Dallas||Roofing material|
|US6500560||15 Sep 2000||31 Dic 2002||Elk Corporation Of Dallas||Asphalt coated structural article|
|US6585813||1 Ago 2002||1 Jul 2003||Elk Premium Building Products, Inc.||Surface covering building materials resistant to microbial growth staining|
|US6586353||15 Sep 2000||1 Jul 2003||Elk Corp. Of Dallas||Roofing underlayment|
|US6673432||2 Jul 2001||6 Ene 2004||Elk Premium Building Products, Inc.||Water vapor barrier structural article|
|US6708456||2 Ago 2002||23 Mar 2004||Elk Premium Building Products, Inc.||Roofing composite|
|US6770354||19 Abr 2001||3 Ago 2004||G-P Gypsum Corporation||Mat-faced gypsum board|
|US6808793||21 Feb 2003||26 Oct 2004||G-P Gypsum Corporation||Pre-coated mat-faced gypsum board|
|US6858550||18 Sep 2001||22 Feb 2005||Elk Premium Building Products, Inc.||Fire resistant fabric material|
|US6872440||14 Nov 2000||29 Mar 2005||Elk Premium Building Products, Inc.||Heat reflective coated structural article|
|US6990779||2 Ago 2002||31 Ene 2006||Elk Premium Building Products, Inc.||Roofing system and roofing shingles|
|US7138346||20 Dic 2002||21 Nov 2006||Atlas Roofing Corporation||Method and composition for coating mat and articles produced therewith|
|US7361617||22 Mar 2005||22 Abr 2008||Elkcorp||Fire resistant composite material and fabrics therefrom|
|US7429544||16 Abr 2004||30 Sep 2008||Owens Corning Intellectual Capital, Llc||Coated facer|
|US7521385||29 Ene 2003||21 Abr 2009||Building Materials Invest Corp||Fire resistant structural material, fabrics made therefrom|
|US7563733||27 Ene 2004||21 Jul 2009||Elkcorp||Composite material|
|US7635657||25 Abr 2005||22 Dic 2009||Georgia-Pacific Gypsum Llc||Interior wallboard and method of making same|
|US7645490||15 Jul 2004||12 Ene 2010||Atlas Roofing Corporation||Method and composition for coating mat and articles produced therewith|
|US7744994||29 Mar 2005||29 Jun 2010||Coveright Surfaces Holding Gmbh||Coating composition, coated article and a method to manufacture the same|
|US7745357||12 Mar 2004||29 Jun 2010||Georgia-Pacific Gypsum Llc||Use of pre-coated mat for preparing gypsum board|
|US7749928||22 Abr 2009||6 Jul 2010||Georgia-Pacific Gypsum Llc||Use of pre-coated mat for preparing gypsum board|
|US7807592||28 Oct 2009||5 Oct 2010||Georgia-Pacific Gypsum Llc||Interior wallboard and method of making same|
|US7842629||27 Jun 2003||30 Nov 2010||Johns Manville||Non-woven glass fiber mat faced gypsum board and process of manufacture|
|US7867927||23 Ago 2006||11 Ene 2011||Atlas Roofing Corp.||Method and composition for coating mat and articles produced therewith|
|US7932195||17 May 2010||26 Abr 2011||Georgia-Pacific Gypsum Llc||Use of pre-coated mat for preparing gypsum board|
|US7981819||20 Dic 2004||19 Jul 2011||Elk Corporation Of Dallas||Fire resistant mattress fabric material and mattress|
|US7989370||5 Oct 2004||2 Ago 2011||Georgia-Pacific Gypsum Llc||Interior wallboard and method of making same|
|US8017531||27 Ene 2004||13 Sep 2011||Elkcorp||Composite material|
|US8030229||27 Ene 2004||4 Oct 2011||Elkcorp.||Composite material|
|US8039058||19 Ago 2008||18 Oct 2011||Owens Corning Intellectual Cap||Methods of forming gypsum facers and gypsum boards incorporating gypsum facers|
|US8070895||20 Abr 2007||6 Dic 2011||United States Gypsum Company||Water resistant cementitious article and method for preparing same|
|US8197893||19 Sep 2008||12 Jun 2012||Building Materials Investment Corporation||Colored metal flake surfaced roofing materials|
|US8329308||31 Mar 2009||11 Dic 2012||United States Gypsum Company||Cementitious article and method for preparing the same|
|US8461067||22 Abr 2011||11 Jun 2013||Georgia-Pacific Gypsum Llc||Use of pre-coated mat for preparing gypsum board|
|US8568544||28 Oct 2011||29 Oct 2013||United States Gypsum Company||Water resistant cementitious article and method for preparing same|
|US8822355||22 Mar 2005||2 Sep 2014||Elkcorp||Fire resistant composite material and fabrics made therefrom|
|US8822356||30 Ago 2010||2 Sep 2014||Elkcorp||Fire resistant composite material and fabrics made therefrom|
|US8974925||15 Oct 2013||10 Mar 2015||United States Gypsum Company||Gypsum board|
|US8987149||30 Ago 2010||24 Mar 2015||Elkcorp||Fire resistant composite material and fabrics made therefrom|
|US20040209074 *||17 Abr 2003||21 Oct 2004||Georgia-Pacific Gypsum Corporation||Mat faced gypsum board|
|US20040229052 *||27 Ene 2004||18 Nov 2004||Elkcorp||Composite material|
|US20040229053 *||27 Ene 2004||18 Nov 2004||Elkcorp||Composite material|
|US20040229054 *||27 Ene 2004||18 Nov 2004||Elkcorp||Composite material|
|US20040235379 *||27 Ene 2004||25 Nov 2004||Elkcorp||Composite material|
|US20040266303 *||27 Jun 2003||30 Dic 2004||Jaffee Alan Michael||Gypsum board faced with non-woven glass fiber mat|
|US20040266304 *||27 Jun 2003||30 Dic 2004||Jaffee Alan Michael||Non-woven glass fiber mat faced gypsum board and process of manufacture|
|US20050103262 *||15 Jul 2004||19 May 2005||Atlas Roofing Corporation||Method and composition for coating mat and articles produced therewith|
|US20050202742 *||12 Mar 2004||15 Sep 2005||Russell Smith||Use of pre-coated mat for preparing gypsum board|
|US20050214555 *||22 Mar 2005||29 Sep 2005||Elkcorp||Fire resistant composite material and fabrics made therefrom|
|US20050215149 *||22 Mar 2005||29 Sep 2005||Elkcorp||Fire resistant composite material and fabrics therefrom|
|US20050215150 *||22 Mar 2005||29 Sep 2005||Elkcorp||Fire resistant composite material and fabrics therefrom|
|US20050215151 *||22 Mar 2005||29 Sep 2005||Elkcorp||Fire resistant composite material and fabrics therefrom|
|US20050215152 *||22 Mar 2005||29 Sep 2005||Elkcorp||Fire resistant composite material and fabrics therefrom|
|US20050223947 *||29 Mar 2005||13 Oct 2005||Coveright Surfaces Holding Gmbh.||Coating composition, coated article and a method to manufacture the same|
|US20050233657 *||16 Abr 2004||20 Oct 2005||Grove Dale A||Coated facer|
|US20050266225 *||5 Oct 2004||1 Dic 2005||Georgia-Pacific Gypsum, Corp.||Interior wallboard and method of making same|
|US20060240236 *||25 Abr 2005||26 Oct 2006||G-P Gypsum Corp.||Interior wallboard and method of making same|
|US20060292948 *||27 Jun 2005||28 Dic 2006||Geel Paul A||Fibrous veil impregnated with surface finish formulation|
|EP0991602A1 *||22 Jun 1998||12 Abr 2000||Elk Corporation Of Dallas||Coated structural articles|
|EP1303672A1 †||12 Jul 2001||23 Abr 2003||Lafarge Platres||Gypsum plaster base board and preparation thereof|
|EP2053083A1||7 Oct 2008||29 Abr 2009||Johns Manville||Fire retardant coating composition for fibrous mat|
|EP2246397A1||27 Abr 2010||3 Nov 2010||Johns Manville||Acoustic and fire retardant foam coating composition for fibrous mat|
|WO2003024881A1||14 Ago 2002||27 Mar 2003||Elk Premium Building Prod Inc||Fire resistant fabric material|
|WO2004094743A2 *||12 Abr 2004||4 Nov 2004||Georgia Pacific Gypsum Corp||Improved mat-faced gypsum board|
|WO2014150781A2 *||12 Mar 2014||25 Sep 2014||United States Gypsum Company||Cementitious article comprising hydrophobic finish|
|Clasificación de EE.UU.||428/219, 428/328, 442/136|
|Clasificación internacional||D06N7/00, E04C2/24, E04C2/04|
|Clasificación cooperativa||Y10T442/2631, D06N2209/067, D06N5/00, E04C2/043, D06N7/0052, E04C2/246, Y10T428/256|
|Clasificación europea||D06N7/00, E04C2/24C, E04C2/04C, D06N7/00B8F|
|9 Jun 1986||AS||Assignment|
Owner name: FIEBIG & SCHILLINGS GMBH, DANZIGER STRASSE 8 D-877
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:BRANDS, HEINRICH;FIEBIG, SIEGFRIED;SCHILLINGS, HANS;REEL/FRAME:004573/0741;SIGNING DATES FROM 19860527 TO 19860528
|23 Mar 1990||AS||Assignment|
Owner name: VLIEPA, VLIES-UND PAPIERVEREDELUNGS GESELLSCHAFT M
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FIEBIG & SCHILLINGS GMBH, DANZIGER STRASSE 8, D-8772 MARKTHEIDENFELD, A CORP. OF THE FED. REP. OF GERMANY;REEL/FRAME:005254/0624
Effective date: 19900213
|13 May 1992||FPAY||Fee payment|
Year of fee payment: 4
|22 Abr 1996||FPAY||Fee payment|
Year of fee payment: 8
|17 Jun 1996||AS||Assignment|
Owner name: SCHILLINGS, HANS, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VLIEPA, VLIES-UND PAPIERVEREDELUNGS GESELLSCHAFT MIT BESCHRANKTER HAFTUNG;REEL/FRAME:007991/0607
Effective date: 19960401
|1 May 2000||FPAY||Fee payment|
Year of fee payment: 12